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rowEchelon


\begin{usage} rowEchelon~a\\ rowEchelon!~a\\ rowEchelon!(a, b) \end{usage}

\begin{signatures} rowEchelon: & M $\to$\ (M,Z $\to$\ Z,Z,\htmlref{\texttt{Pri... ...Z,Z,\htmlref{\texttt{PrimitiveArray}}{PrimitiveArray} Z,Z)\\\end{signatures}



\begin{params} {\em a} & M & A matrix whose REF has to be computed\\ {\em b} & M & A matrix to transform in the same way than $a$\\\end{params}

\begin{descr} We say that a matrix $a$\ is in REF if there are $r$\ (the rank)... ...es all the elementary transformations applied to $a$\ also to $b$.\end{descr}

\begin{remarks} rowEchelon!~does not make a copy of $a$, but performs all the c... ...helon!(a, b) performs all the computations relative to $b$in $b$. \end{remarks}


See Also


Manuel Bronstein 2000-12-13